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A boiler operation control method for preventing clogging of SCR denitration zone

A boiler operation and SCR system technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as blockage of SCR denitrification area, and achieve the effect of low transformation cost, easy implementation, and simple process

Active Publication Date: 2019-11-19
XINTE ENERGY
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the above-mentioned deficiencies existing in the prior art, and provides a method for preventing the blockage of the SCR denitrification area of ​​the boiler, so as to solve the problem of the blockage of the SCR denitrification area

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  • A boiler operation control method for preventing clogging of SCR denitration zone
  • A boiler operation control method for preventing clogging of SCR denitration zone
  • A boiler operation control method for preventing clogging of SCR denitration zone

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Embodiment Construction

[0030] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] In the production practice, the inventor found that the amount of ammonia sprayed by each ammonia injection grid is not uniform due to the different intake air volumes of the various intake branch pipes in the reactor. The larger the value, the greater the ammonia injection volume of the corresponding ammonia injection grid, and vice versa. When the ammonia injection grid at the far end of the flue is guaranteed to meet the minimum ammonia injection volume required for environmental...

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Abstract

The invention provides a boiler operation control method for preventing blockage in an SCR denitration zone. When the SCR denitration zone is put into operation during operation of a boiler, the opening degrees of valves of a plurality of gas inlet branch pipes are regulated from low to high according to the distance, increasingly, from ammonia spraying gratings to the central line of a furnace hearth of the boiler, so that the ammonia spraying quantities of the ammonia spraying gratings are equal. In addition, escape rates of ammonia of all positions of the ammonia spraying gratings are controlled to be less than a preset threshold value. The method fundamentally solves the problem of blockage in the SCR denitration zone and has good effect of preventing the blockage in the SCR denitration zone. The method has simple processes and low system modification cost and is easy to achieve.

Description

technical field [0001] The invention relates to the technical field of power plant production, in particular to a boiler operation control method for preventing blockage of an SCR denitrification zone. Background technique [0002] With the continuous deepening of the concept of environmental protection and the improvement of the country's environmental protection requirements for the coal power industry, at present, for the first-class areas, the NOx (nitrogen oxides) emission requirements are from 100mg / Nm 3 Adjusted to 50mg / Nm 3 Otherwise, the unit will be fined, load limited, or even shut down. Therefore, with the increasing pressure of environmental protection, coal power production enterprises across the country have successively put into operation SCR (Selective Catalytic Reduction, Selective Catalytic Reduction) denitrification facilities. [0003] However, with the continuous use of SCR denitrification facilities, the following problems also appeared in the power ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/90B01D53/56
Inventor 李鹏曾琦任建平何武强
Owner XINTE ENERGY